So it begins...

patches/unapplied/server/Unset-Ignited-flag-on-cancel-of-Explosion-Event.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 10 Jun 2018 01:18:49 -0400
+Subject: [PATCH] Unset Ignited flag on cancel of Explosion Event
+
+Otherwise the creeper infinite explodes
+
+diff --git a/src/main/java/net/minecraft/world/entity/monster/Creeper.java b/src/main/java/net/minecraft/world/entity/monster/Creeper.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/entity/monster/Creeper.java
++++ b/src/main/java/net/minecraft/world/entity/monster/Creeper.java
+@@ -0,0 +0,0 @@ public class Creeper extends Monster implements PowerableMob {
+             // CraftBukkit start
+             } else {
+                 this.swell = 0;
++                this.entityData.set(DATA_IS_IGNITED, Boolean.valueOf(false)); // Paper
+             }
+             // CraftBukkit end
+         }